Tool holder guard



March 21, 1933 I l. E. 'roNiEwlcz ET Al. 1,902,679.

Tool. oLDER GUARD Filed Mrch 19. 1931 Patented Mar. 2l, 1933 UNITED STATES PATENT-OFFICE IsIDonnn 'ronrnwrcz AND MICHAEL LIzoN, or BUFFALO, NEW YORK Toon HOLDER GUARD Application med March 19, 1931. vseran No, 523,374;`

This invention relates to a tool vholder guard, and more particularly to a device of this character adaptedfto be applied to the holder of a lathe or similar machine.V When 5 a workman is operating a lathe `or similar machine, the cuttings are liable to fly upwardly and rearwardly, especially if very hard metal is being cut and since these cuttings are often very hot, they are liable to injure the workman either by cutting or burning him. This is particularlytrue if a cutting should lodge in a workmans eye. Some workmen wear goggles in order to protect their eyes, but Vthis has been found unsatisfactory as the goggles sometimes interfere with a workmans sight and prevent him from clearly seeing the work being done.

` Therefore one object of the invention is to provide a guard which may be easily applied to a tool holder and will serve ver-y effectively to prevent cuttings from striking aiworkman operating a lathe or other machine.

Another object of the invention is to so form the guard that a portion thereof extending upwardly over a cutter or other tool may be formed of transparent material, thereby allowing the workman to see the tool during a cutting operation `and at the same time be protected from particles of metal thrown upwardly and rearwardly during a cutting operation.

Another object of the invention is to provide a device of this characterwhich is very simple in construction and may be formed of sheet metal and thereby cheaply produced.

The invention is illustrated in the accompanying drawing, wherein Figure l isa side elevation showing the improved shield applied to a tool holder,

Figure 2 is a top plan view of the shield. Figure 3 is a front elevation of the shield, Figure 4 is a perspective view of the improved shield with a frame carrying a vsheet of transparentmaterial and forming Vpart of the shield detached, 1 i

Figure 5 is an enlarged sectional view taken along the line 5 5. of Figure 2,V l

Figure 6 is a view of the blank from which f the body portion of the shield is formed,

and z .Ll I, ,.1. nella this'intermediate portion of the blank is bent Figure 7 isa view of the blank from which therframe carrying the transparentsheet is formed. '7

The improved shield has been shown ap- 1 plied to a toolholder 1 which'isy cfa' conventional construction andfisformed at its forward end with asocket inwhich a' cutter 2 is fitted andsecured by 'aset screw 3.` The shield is vapplied to the holder as shownin 60 this view and has an' atta'ching portion 4 which extends transversely across the top ofthe holder andlis provided with arms 5extending rearwardly. 1 l j,v

The arms are spaced from each other a dis- 65 tance corresponding substantially tothe `diameter of the set screw3 and lit between the head of the set screw and theupper Vface of the holder. Therefore when the set screw is tightened to secure the cutter to the arms .',n theywill be firmly gripped Vby the. head of the screw and the shield `securely held in place.

VThe body portion ofthe shield is formed from a sheet metal blank shown in Figure 6 and thisblank is cut along lines 6 to provide portions which when bent downwardly'along thel dotted line 7 form side wings or guards, 8 disposedat opposite sides of thev tool holder. Outer side portions 9 of the side wings or guards are bentalong the dotted lines 10 to form deflectorswhioh extend vforwardlyat an incline in diverging relation to each other and serve 'very effectively to cause partiv cles of metal which strike the side wings 'to g5 be deflected forwardly and prevented vfrom striking a workman. The intermediate portion of the `blankgis cut out from its Vforward end, thereby forming armsfll connected at A, their inner ends` by a bridge 12 and'when f upwardly along the d otted line 7 the arms 11 will project forwardly at an upward incline. Since the inner `ends of the arms are 4cony nected by the bridge 12 there will be no dan- 95 ger of these arms breaking olf.

1 In order to permit a workman to see the cutter or other tool 2there has been provided a sheet 13 formed ofi'celluloid or any other suitablejmaterial. This Atransparent sheet is fitted into a frame formed from the blank i ico shown in Figure 7. This blank has side portions 14 connected by a narrow strip 15 and when the side portions are folded along the dotted lines 16 a frame will be formed having side bars 17 connected by an inner end The inner end ybar 18 overlaps. the bridge.

12 and therefore the frame will be firmly engaged with the arms 11 and may beheld in place either by frictional bindingI or solder may be applied to firmly hold the frame in engagement withy the 4arms and bridge.

' The strip of transparent material may be tinted in order to prevent a workmans eyes being injured by looking at the hot metal cut by the tool2. This sheet'of transparent material may fit in the frame with sufficient loosenessto permit it to be removed and a new one applied when necessary.

-Outer side portions 20 of the side bars 17 are bent to extend forwardly in diverging relation Yto each. other thereby providing flanges. or wings which will serve very effectively to prevent metalrparticles flying rearwardly from sides of the shield after striking theI transparent sheet..

We have Ytherefore provided a shield so constructed that there will be no danger of a workman being injured by metal particles thrown off by a cutter or other tool when working at a lathe and at the same time have provided a shield which is very simplein construction and easy to apply. Y We have-further provided a shield so constructed that` a workman will not be prevented from seeing the end of the tool.

j What is claimed is:

1'. A guard for a toolholder comprisingl an attaching portion adapted to be firmly se cured upon a tool holder, wings at opposite sidesof said attaching portion disposed transversely thereof and extending downwardly therefrom, a` portion projecting upwardly at a forward inclinev from the front of said attaching portion between said wings, and havn ing armsspaced transversely from each other and a bridge connecting inner ends of the arms and joinedto the attaching portion, a

frame having side bars fitting upon said arms in stra-ddling relation thereto and an' inner end bar overlapping said bridge and a trans parent sheetI in said frame having its inner end overlapped by theinner end bar and its side portions engaged between said arms and portions of the side bars. 1

2. A guard for a tool holder comprising an attaching portion adapted to be firmly secured upon a tool holder, wings at opposite sides of said attaching portion disposed transversely thereof and extending downwardly therefrom, a portion projecting upwardly at a forward incline from the front of said attaching portion between said wings, and having arms spaced transversely from each other and a bridge connecting innerV ends of the arms and joined to the attaching portion, a frame having side bars fitting upon said arms in straddling relation thereto and an inner end bar overlapping said bridge and a transparent sheet in saidframe having its inner end overlappedk by thev inner end bar and its side portions engaged between said arms and portions of the side bars, said wings having outer side portions projecting from said attachingportin and bent to extend forwardly at an incline in.y diverging relation to each other,and outer side portions of the side bars of said frame being bent to extend forwardly at an incline indiverging relation to each other. f

3. A guard for a tool holder comprising an attaching portion adapted to be firmly secured upon a. tool holder, wings at opposite sides of said attaching portion disposed transversely thereof and extending downwardly therefrom.l a portion projecting upL wardly at a forward incline from the front of said attaching portion between said wings, and having arms spaced transversely from each other and a bridge connecting inner ends ofthe arms and joined to the attaching portion, a frame having side bars fitting upon said arms in straddling relation thereto and an inner end bar overlapping said bridge and a transparent sheet inf said frame havingk A its `inner end overlapped by the inner end bar and its side portions engaged between said arms and portions of the side bars, the. side bars of said frame having portions projecting from outer side edges of said arms and bent to extend forward at an incline in div verging relation to each other.

4. A guard for a tool holder comprising an attaching portion adapted to be firmly securedV upon a tool holder, depending wings at opposite sides of said attaching portion adapted toV straddle said tool holder, outer side portions of the wings extending laterally beyond said attaching portion and bent to project forwardly at an incline in diverging rela-tion to each other, farms projecting upwardly at a forward incline from said a-ttaching portion, a frame carried by said arms, and a transparent sheet carriedv byV saidA frame.

5. A guard for a tool holder comprising an' attaching portion adapted to be firmly secured upon a tool holder, depending laterally extending wings at opposite sides of said attaching portion adapted to straddle said ltool holderV and forming side guards, a portion projecting upwardly at a forward incline from the front of said attaching portion be-Y tween said wings, a frame carried by the lastmentioned portion, and a transparent sheet carried by the frame.

6. A guard for a tool holder comprising an attaching portion adapted to be firmly secured upon a tool holder, depending laterally extending wings at opposite sides of said attaching portion adapted to straddle said tool holder and forming side guards, a shield projecting upwardly at a forward incline from the front of said attaching portion, and a transparent sheet carried by the shield.

7. A guard for a tool holder comprising an attaching portion adapted to be firmly secured upon a tool holder, depending laterally extending wings at opposite sides of said attaching portion adapted to straddle the tool holder and forming side guards, said wings being provided with terminal angularly disposed deflectors, a shield projecting upwardly at a forward incline from the front of said attaching portion between said wings and having arms spaced transversely from each other and a bridge connecting inner ends of the arms and joined to the attaching portion, a frame engaged upon said arms with its inner end overlapping said bridge, and a sheet of material carried by said frame.

In testimony whereof we aiiix our signatures.

ISIDORE E. TONIEWICZ. [11. s] MICHAEL LIZON. [11. s] 

